where the rubber band would be for counter weight,
attach the body to the base, the higher part should be toward the 3 dots.
secure the 2 parts together using the screws from the top base we removed

from the tank.

hotglue the servo motor to the body, then attach the neck to the body,the T would go towards the higher part of the body pass the wires for the camera

then using a piece of string pass the rubber band through the body, and attached to the base that would work as a counter weight for the head using some hot glue we would attach the rest of the parts if after putting everything together it falls and does not move back up you need to adjust the rubber band tension or the servo arm needs to be